Raimondo Boucheron (15/03/1800 - 28/02/1876) was an Italian composer, chiefly of sacred music. During his life, he was known primarily for the song "Inno per le cinque giornate". Today he is remembered as one of the contributors to the Messa per Rossini, for which he wrote the Confutatis and Oro supplex of the Dies irae. He also served for a time as maestro di cappella of Milan Cathedral, being succeeded in the post by Guglielmo Quarenghi.

In 1868, four days after the death of Gioacchino Rossini, composer of The Barber of Seville, Moses, and William Tell (among much else), Verdi proposed a requiem mass for the illustrious deceased consisting of individual movements by Italy's "most eminent" composers. Of the dozen recruited (in addition to Verdi himself), contemporary audiences will recognize not one. At Verdi's suggestion, it consisted of contributions from the following composers: Antonio Buzzolla ('Requiem and Kyrie'); Antonio Bazzini ('Dies irae'); Carlo Pedrotti ('Tuba mirum'); Antonio Cagnoni ('Quid sum miser'); Federico Ricci ('Recordare'); Alessandro Nini ('Ingemisco'); Raimondo Boucheron ('Confutatis' and 'Oro Supplex'); Carlo Coccia ('Lacrymosa'); Gaetano Gaspari ('Domine Jesu'); Pietro Platania ('Sanctus'); Lauro Rossi ('Agnus Dei'); Teodulo Mabellini ('Lux aeterna') and Giuseppe Verdi himself ('Libera me').
Yet each did his part, and a two-hour homage to Rossini resulted. The composite requiem mass for Rossini was to have been performed in 1869 in Bologna to commemorate the anniversary of Rossini's death. For tangled reasons—this was Italy—the planned performances failed to materialize. Verdi was not the only contributor to recycle his part within a larger composition of his own, and his staggering 'Libera me' duly made its way into the requiem for Italy's great nationalist novelist and poet Alessandro Manzoni. But the forgotten patchwork Messa per Rossini only saw the light in 1988, in Parma. On June 22, Helmuth Rilling, the conductor on that occasion, dusts it off as the opening concert of his Oregon Bach Festival, in Eugene, which by no means confines itself to Bach.